Medical tubes are well balanced in transparency, flexibitity, heat resistance, scratch resistance and rubber elasticity.The medical tubes including a propylene polymer composition (A) that contains a polymer with propylene units, at least part of the polymer having an isotactic structure and the total of the propylene units of the polymer being in an amount of 65 to 82 mol% (the total of the structural units of the polymer in the composition is 100 mol%), and that satisfies the following (a1), (a2) and (b1):(a1) the modulus in tension is in the range of 5 to 25 MPa as determined in accordance with JIS K 6301(a2) the penetration temperature is 120℃ or above as determined in accordance with JIS K 7196and (b1) when a tube being made of the composition (A) and having an inner diameter of 2.1mm, an outer diameter of 3.5mm and a length of 20cm is looped by inserting both ends thereof into a hollow jig having a hole 10 mm in diameter and 5 mm in height and, then, the both ends of the tube are pulled down until a kink occurs in the loop, the distance H from the upper surface of the jig to the upper end of the loop is not more than 60mm.本發明係由丙烯系聚合體組成物(A)所構成之醫療用管,該丙烯系聚合體組成物(A)含有具丙烯單位之聚合體,而該具丙烯單位之聚合體之至少一部分具有整規(isotactic)構造;相對於該組成物(A)所含之全部該具丙烯單位之聚合體中的構造單位合計100莫耳%,丙烯單位的含量為65~82莫耳%;本發明之醫療用管並滿足下述(a1)、(a2)及(b1):(a1)以JIS K6301為基準所測定之拉伸彈性模數為5~25MPa;(a2)以JIS K7196為基準所測定之針進入溫度為120℃以上;(b1)由該組成物(A)製成內徑2.1mm、外徑3.5mm、長20cm之管,將該管之兩端插入至具有直徑10mm×高度5mm之中空孔的型架中而形成環圈(loop),拉下該管兩端,扭結(kink)該環圈時之從該型架頂面至該環圈上端的距離H為60mm以下。1...中空圓筒(型架)2...管H...型架頂面至環圈上端的距離
